In the following we want to introduce a different way of defining edges, based on hypergeometric filtering: it is a stochastic benchmark for normalization purposes, as recently used in [1]}, [2]} and previously introduced in [3]}. This method has been used to identify statistically significant portions of data in fields ranging from genetics to network theory [4]}, [5]} and to study the relatedness of corporation activities to understand their business coherence [6]}.
